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Finding the Fourth Proportional to 38,495.70, 57,743.55 and 20,999.70

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Solution

The fourth proportional to 38,495.70, 57,743.55 and 20,999.70 is: 31,499.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,495.70 : 57,743.55 = 20,999.70 : x
  2. Step 2: Convert to fraction form
    38,495.70/57,743.55 = 20,999.70/x
  3. Step 3: Cross multiply
    38,495.70x = 57,743.55 × 20,999.70
  4. Step 4: Simplify right side
    38,495.70x = 1,212,597,226.94
  5. Step 5: Solve for x
    x = 1,212,597,226.94/38,495.70
  6. Step 6: Final answer
    x = 31,499.55

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.